Liverpool owner John W. Henry was left "bitching" because he thought he had overpaid for "unbelievable bargain" Mohamed Salah, according to Roma president James Pallotta.
Salah joined Liverpool in June for an initial €42 million, which could rise to €50m, and has gone on to enjoy a sensational first season at Anfield.
The Egypt international has netted 31 times in just 33 Premier League appearances, equalling the record for the most goals scored in a 38-game season.
He has also scored nine in 12 Champions League outings, playing a vital role in Liverpool's charge to the last four.